Ever lost your contact lens case's cap when you're out on vacation? It stinks, but instead of rushing out to buy a new case, Redditor westleyh suggests just using the cap off a 20 ounce drink.

Many contact lens cases are a standard size, and that means they can use caps from all sorts of things. A 20 ounce drink cap worked great on a couple cases I have. Just take the cap off your drink, and screw it onto the contact case just like you would the cap. It didn't work with all my cases, but if you're in a pinch with a lost cap it's worth a shot.